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为了使角反射器的3dB波束宽度能覆盖合成孔径雷达天线所有模式对应的入射角范围,提出了一种合成孔径雷达角反射器的优化设计方法.首先结合光线追迹和Gordan面元积分法提出一种角反射器雷达截面积的快速计算方法,再通过大量仿真计算得出角反射器3dB波束宽度随棱长比和安置角度的变化规律,最后基于此对目前常规的三条棱边等长型的角反射器进行优化设计,以提高其3dB波束宽度.优化设计计算结果表明卫星HJ-1C,ENVISAT和ALOS在各自入射角范围内,角反射器方位向3dB波束宽度分别增大了6.06°,6.26°和16.00°.
In order to make the 3dB beamwidth of corner reflectors cover the range of incident angles corresponding to all modes of synthetic aperture radar antenna, an optimal design method of corner reflector for synthetic aperture radar is proposed.Firstly, combining the ray tracing and Gordan surface integral method A rapid method for calculating the cross-sectional area of a corner reflector radar is given. The variation of 3dB beamwidth with the aspect ratio and the placement angle are obtained through a large number of simulation calculations. Finally, based on this, Corner reflector was designed to improve its 3dB beamwidth.The results of optimization design show that the azimuth reflector azimuth 3dB beamwidth increases 6.06 ° respectively in the range of incident angles of satellite HJ-1C, ENVISAT and ALOS, 6.26 ° and 16.00 °.